25542001 has 2 divisors, whose sum is σ = 25542002. Its totient is φ = 25542000.

The previous prime is 25541977. The next prime is 25542031. The reversal of 25542001 is 10024552.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15397776 + 10144225 = 3924^2 + 3185^2 .

It is a cyclic number.

It is not a de Polignac number, because 25542001 - 2⁵ = 25541969 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25542001.

It is not a weakly prime, because it can be changed into another prime (25542031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12771000 + 12771001.

It is an arithmetic number, because the mean of its divisors is an integer number (12771001).

Almost surely, 2^25542001 is an apocalyptic number.

It is an amenable number.

25542001 is a deficient number, since it is larger than the sum of its proper divisors (1).

25542001 is an equidigital number, since it uses as much as digits as its factorization.

25542001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 25542001 is about 5053.9094768308. The cubic root of 25542001 is about 294.4997785277.

Adding to 25542001 its reverse (10024552), we get a palindrome (35566553).

The spelling of 25542001 in words is "twenty-five million, five hundred forty-two thousand, one".